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- Title
Light helicity detector based on 2D magnetic semiconductor CrI<sub>3</sub>.
- Authors
Cheng, Xing; Cheng, Zhixuan; Wang, Cong; Li, Minglai; Gu, Pingfan; Yang, Shiqi; Li, Yanping; Watanabe, Kenji; Taniguchi, Takashi; Ji, Wei; Dai, Lun
- Abstract
Two-dimensional magnetic semiconductors provide a platform for studying physical phenomena at atomically thin limit, and promise magneto-optoelectronic devices application. Here, we report light helicity detectors based on graphene-CrI3-graphene vdW heterostructures. We investigate the circularly polarized light excited current and reflective magnetic circular dichroism (RMCD) under various magnetic fields in both monolayer and multilayer CrI3 devices. The devices exhibit clear helicity-selective photoresponse behavior determined by the magnetic state of CrI3. We also find abnormal negative photocurrents at higher bias in both monolayer and multilayer CrI3. A possible explanation is proposed for this phenomenon. Our work reveals the interplay between magnetic and optoelectronic properties in CrI3 and paves the way to developing spin-optoelectronic devices. Two-dimensional magnetic semiconductors hold promise for spin- and valleytronic applications. Here, the authors report the realization of light helicity detectors based on graphene/CrI3 van der Waals heterostructures, exhibiting a photocurrent behaviour determined by the magnetic state of CrI3.
- Subjects
MAGNETIC semiconductors; PHOTODETECTORS; VAN der Waals forces; MAGNETIC circular dichroism; PHOTOCURRENTS; MAGNETIC fields; MAGNETIC properties
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-27218-3